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detecting-port-scanning-with-fail2ban

67 / 100 · Review before installing

Check before installing. Some of what it can do is expected: a security skill usually runs scanners and checks websites.

By plurigrid/asi (GitHub) · security · 72 stars · scanned at commit 293ce9f

Configures Fail2ban with custom filters and actions to detect port scanning activity, SSH brute force attempts, and network reconnaissance, automatically banning offending IP addresses and alerting security teams to suspicious network probing.

Works with any agent that supports SKILL.md skills.

What this skill can do

Safer alternatives

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Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'detecting-port-scanning-with-fail2ban' ] || [ -L ~/.agents/skills/'detecting-port-scanning-with-fail2ban' ]; then echo 'A skill folder named detecting-port-scanning-with-fail2ban already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/plurigrid/asi' "$d" && git -C "$d" checkout --quiet '293ce9f76e3abcd5ba18db284688bc0d9ac6691d' -- 'plugins/asi/skills/detecting-port-scanning-with-fail2ban' && mkdir -p ~/.agents/skills && cp -R "$d"/'plugins/asi/skills/detecting-port-scanning-with-fail2ban' ~/.agents/skills/'detecting-port-scanning-with-fail2ban' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'detecting-port-scanning-with-fail2ban' ~/.claude/skills/'detecting-port-scanning-with-fail2ban' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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